I am looking for a decent flash mainly for my E-M1 and might be used on my e-pl5 if I keep it. I have a chance to get a used FL50R for $300 or the Fl600r new is $250. I do tend to use flash quite a bit so looking for thoughts on which one to buy on a budget. I really don't know much about Olympus flashes coming from Nikon where I use SB-910 and Quantum Trio. Looking for TTL and off camera flash is a must have.